278447765379 has 16 divisors (see below), whose sum is σ = 424698305280. Its totient is φ = 158964153120.

The previous prime is 278447765357. The next prime is 278447765381. The reversal of 278447765379 is 973567744872.

It is not a de Polignac number, because 278447765379 - 2⁵ = 278447765347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (278447765329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6179337 + ... + 6224234.

It is an arithmetic number, because the mean of its divisors is an integer number (26543644080).

Almost surely, 2^278447765379 is an apocalyptic number.

278447765379 is a deficient number, since it is larger than the sum of its proper divisors (146250539901).

278447765379 is a wasteful number, since it uses less digits than its factorization.

278447765379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12404650.

The product of its digits is 497871360, while the sum is 69.

The spelling of 278447765379 in words is "two hundred seventy-eight billion, four hundred forty-seven million, seven hundred sixty-five thousand, three hundred seventy-nine".